Article with zeolites

Patent metadata

Field	Value
Publication number	US-10940059-B2
Application number	US-201715838413-A
Country	US
Kind code	B2
Filing date	Dec 12, 2017
Priority date	Dec 19, 2016
Publication date	Mar 9, 2021
Grant date	Mar 9, 2021

Abstract

Absorbent articles with substantially cellulose-free cores with zeolites.

First claim

What is claimed is:

1. A disposable absorbent article having a longitudinal centerline and a lateral centerline, a front waist region with a front waist edge, a rear waist region with a rear waist edge, a crotch region disposed between the front waste region and the rear waist region, and two spaced apart longitudinal side edges joining the front waist edge to the rear waist edge and comprising an assembly of components including a topsheet, a backsheet, and an absorbent core therebetween;
wherein the absorbent core is substantially free of cellulose fibers; and
wherein the absorbent core comprises a mixture of at least two types of zeolites,
wherein the first type of zeolite is characterized by:
a) a FAU (Faujasite) framework wherein:
i) the sodium content expressed as Na 2 O is below 10 wt %; and
wherein the second type of zeolite is characterized by:

b) a MFI (Mordenite Framework Inverted) framework wherein:
i) the sodium content expressed as Na 2 O is below 1 wt %; and
wherein the third type of zeolite is characterized by:

c) a MOR (Mordenite) framework wherein:
i) the sodium content expressed as Na 2 O is below 5 wt %.

2. The disposable absorbent article of claim 1 , wherein the zeolites are selected from the group consisting of:
a) a FAU framework wherein:
i) the sodium content expressed as Na 2 O is below 2 wt %;
ii) the silica to alumina ratio is greater than 4.0;

b) a MFI framework wherein:
i) the sodium content expressed as Na 2 O is below 0.1 wt %;
ii) the silica to alumina ratio is less than 500; and

c) a MOR framework wherein:
i) the sodium content expressed as Na 2 O is below 1 wt %.

3. The disposable absorbent article of claim 1 , wherein the zeolites are selected from the group consisting of:
a) a FAU framework wherein:
i) the sodium content expressed as Na 2 O is below 2 wt %;
ii) the silica to alumina ratio is greater than 5.0;
iii) the silica to alumina ratio is less than 100.0;

b) a MFI framework wherein:
i) the sodium content expressed as Na 2 O is below 0.1 wt %;
ii) the silica to alumina ratio is less than 500;
iii) the silica to alumina ratio is greater than 25; and

c) a MOR framework wherein:
i) the sodium content expressed as Na 2 O is below 1 wt %;
ii) the silica to alumina ratio is less than 50;
iii) the silica to alumina ratio is greater than 10.

4. The disposable absorbent article of claim 1 , wherein the zeolites are mixed with at least one additional component selected from the group consisting of silica, alumina, clay, silica-aluminate, and a metal oxide.

5. The disposable absorbent article of claim 4 , wherein the ratio of the silica to the zeolites is from about 1:1 to about 3:1.

6. The disposable absorbent article of claim 1 , wherein the zeolites comprise from about 10% to about 90% of an FAU framework; and the zeolites comprise from about 10% to about 90% of an MFI framework.

7. The disposable absorbent article of claim 1 , wherein the zeolites comprise from about 10% to about 90% of an MOR framework; and the zeolites comprise from about 10% to about 90% of an MFI framework.

8. The disposable absorbent article of claim 1 , wherein the zeolites comprise from about 10% to about 90% of an FAU framework; the zeolites comprise from about 10% to about 90% of an MFI framework; and the zeolites comprise from about 0% to about 90% of an MOR framework.

9. The disposable absorbent article of claim 1 , wherein the zeolites comprise from about 25% to about 75% of an FAU framework; and the zeolites comprise from about 25% to about 75% of an MFI framework.

10. The disposable absorbent article of claim 1 , wherein the zeolites comprise from about 20% to about 70% of an FAU framework; the zeolites comprise from about 20% to about 70% of an MFI framework; and the zeolites comprise from about 0% to about 10% of an MOR framework.

11. The disposable absorbent article of claim 1 , wherein the absorbent core comprises less than about 20% by weight of cellulose fibers.

12. The disposable absorbent article of claim 1 , wherein the absorbent core comprises less than about 2% by weight of cellulose fibers.

13. The disposable absorbent article of claim 1 , wherein the absorbent core is free of cellulose fibers.

14. The disposable absorbent article of claim 1 , wherein the absorbent core comprises a center, and wherein at least 70% of the zeolites are placed in a stripe about 20 mm wide in the center of the absorbent core.

15. The disposable absorbent article of claim 1 , wherein the absorbent core further comprises silica.

16. The disposable absorbent article of claim 1 , wherein the zeolites comprise frameworks selected from the group consisting of:
a) an FAU framework, wherein:
i) the sodium content expressed as Na 2 O is below 10 wt %;
ii) the silica to alumina ratio is greater than 4.0;

b) an MFI framework, wherein:
i) the sodium content expressed as Na 2 O is below 1 wt %;
ii) the silica to alumina ratio is less than 500; and

c) an MOR framework, wherein:
i) the sodium content expressed as Na 2 O is below 5 wt %.

17. The disposable absorbent article of claim 1 , wherein the disposable absorbent article further comprises at least one additional component selected from the group consisting of:
a) a liquid management system comprising an acquisition layer and a distribution layer, the liquid management system disposed between the topsheet and the absorbent core;
b) a fastening system for joining the front waist region to the rear waist region when the absorbent article is worn;
c) barrier cuffs lying adjacent and inboard one of the longitudinal side edges;
d) gasketing cuffs lying between the longitudinal side edge and the barrier cuff;
e) front ears disposed in the front waist region;
f) back ears disposed in the rear waist region; and
g) at least one hot melt adhesive composition suitable for joining at least two absorbent article components together.

18. A disposable absorbent article of claim 1 having a longitudinal centerline and a lateral centerline, a front waist region with a front waist edge, a rear waist region with a rear waist edge, a crotch region disposed between the front waist region and the rear waist region, and two spaced apart longitudinal side edges joining the front waist edge to the rear waist edge and comprising an assembly of components including:
a) a topsheet;
b) a backsheet underlying the topsheet;
c) an absorbent core comprising two substrates;
wherein each substrate has a layer of absorbent material disposed thereon;
wherein each substrate has a layer of fibrous thermoplastic material at least partially in contact with the layer of absorbent material; and
wherein the absorbent core comprises the mixture of at least two zeolites with the absorbent material.

19. A disposable absorbent article according to claim 1 having a longitudinal centerline and a lateral centerline, a front waist region with a front waist edge, a rear waist region with a rear waist edge, a crotch region disposed between the front waist region and the rear waist region, and two spaced apart longitudinal side edges joining the front waist edge to the rear waist edge and comprising an assembly of components including:
a) a topsheet;
b) a backsheet underlying the topsheet;
c) an absorbent core disposed between the topsheet and the backsheet, the absorbent core being free of cellulose and comprising a mixture of three zeolites;
wherein the zeolites comprise frameworks selected from the group consisting of:
a) an FAU framework w

Assignees

• Procter & Gamble

Inventors

• Tee Jr Johannson Jimmy
• Miller Kristin Hofmann
• Cheeseman William Winfield
• Dziezok Peter
• Beruda Holger
• Jennewein Marc
• West Ryan Michael
• Labitzke Kevin Max
• Stapp Vincent Scott
• Allen Emily Suzanne

Classifications

• A61L15/18 Primary

  containing inorganic materials · CPC title

• B01J20/18

  Synthetic zeolitic molecular sieves · CPC title

• B01J20/2805

  Sorbents inside a permeable or porous casing, e.g. inside a container, bag or membrane · CPC title

• A61L15/46

  Deodorants or malodour counteractants, e.g. to inhibit the formation of ammonia or bacteria · CPC title

• A61F2013/5395

  with thermoplastic agent, i.e. softened by heat · CPC title